<template>
  <div>
    <table class="table">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th><input type="checkbox" v-model="All" />全选</th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <Table
          v-for="(item, index) in goodList"
          :key="index"
          :obj="item"
          :index="index"
          @del="delFn"
          @add="addFn"
          @minus="minusFn"
        ></Table>
      </tbody>
      <tfoot>
        <tr>
          <td>合计：</td>
          <td colspan="5">{{ total }}</td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import Table from './components/07-table-car.vue'
export default {
  components: {
    Table,
  },
  data() {
    return {
      goodList: [
        {
          name: '诸葛亮',
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: '蔡文姬',
          price: 1500,
          num: 1,
          checked: true,
        },
        {
          name: '妲己',
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: '鲁班',
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    }
  },
  methods: {
    delFn(index) {
      this.goodList.splice(index, 1)
    },
    addFn(index) {
      this.goodList[index].num += 1
    },
    minusFn(index) {
      this.goodList[index].num > 1 ? (this.goodList[index].num -= 1) : 0
    },
  },
  computed: {
    total() {
      return this.goodList.reduce((acc, item) => {
       if(item.checked==true){
         acc += (item.num * item.price)
       }  
        return acc
        
      }, 0)
    },
    All: {
      set(val) {
        return this.goodList.forEach((item) => (item.checked = val))
      },
      get() {
        return this.goodList.every((item) => item.checked == true)
      },
    },
  },
}
</script>

<style>
.table {
  border: 1px black solid;
  width: 700px;
  border-collapse: collapse;
}
tbody {
  width: 700px;
}
th,
td {
  border: 1px black solid;
}
</style>
